Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Reinforcement Material
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Key Features & Benefits
- Provides a combination of high-strength and ablative properties for demanding applications
- Low thermal expansion
- Good Tack and Drape properties
- Conforms to MIL-R-9299 Type B
- Product Forms
- Available on a wide variety of reinforcements, including fiberglass, graphite, and quartz
- Also available as a Molding Compound and Bias Tape
- Solution coated fabrics up to 152 cm wide
- Compatible with Autoclave or Press Molding processes
Applications & Uses
- Markets
- Applications
- Composites End Use
- Composites Processing Methods
- Applications / Qualifications
- Rocket Nozzles
- Ducting
- Secondary Structure
- Autoclave Cure Cycle
- Apply 610 mmHg vacuum (minimum) for 1 hour before beginning heat cycle
- Apply 689 KPa autoclave pressure
- Raise product temperature from RT to 121°C at 1 - 3°C/min
- Increase autoclave pressure to 276 KPa, vent vacuum at 103 – 138 KPa
- Hold product at 121 ± 3°C for 30 minutes
- Raise product temperature to 163 ± 3°C at 1 - 3°C/min
- Hold product at cure temperature for 60 – 90 minutes
- Cool to 66°C at no more than 5°C/min prior to releasing autoclave pressure
- Optional Post Cure Cycle for High-Temp Applications
- Heat Rise Rate between soak temperature: 1 – 5 °C/min
- 121°C for 2 hours
- 149°C for 1 hour
- 177°C for 1 hour
- 204°C for 1 hour
- 218°C for 1 hour
- 232°C for 2 hours
- High Silica Phenolic Autoclave Cure Cycle
- Apply 610 mmHg vacuum (minimum) for 1 hour before beginning heat cycle
- Raise product temperature from RT to 93°C at 1 - 3°C/min
- Apply autoclave pressure of 689 KPa, vent vacuum at 103 - 138 KPa
- Raise product temperature to 177°C at 1 – 3°C /min
- Hold product at 177 ± 3°C for 60 - 90 minutes
- Cool to 66°C at 5°C/min prior to releasing autoclave pressure
- Post Cure o Heat Oven to 177°C at 1 – 5°C /min and hold for 2 hours o Hold product at 204°C for 4 hours
Properties
- Physical Properties
- Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Fabric Area Weight | 617 | gsm | — |
| Prepreg Resin Content | 32 - 38 | % | — |
| Resin Flow (163°C, 103kPa) | 10 - 25 | % | — |
| Volatiles (135°C, 8 min) | 2 - 8 | % | — |
| Gel Time | 50-200 | Seconds | — |
| Value | Units | Test Method / Conditions | |
| Hardness | 75 | Barcol | ASTM-D-2583 |
| Per Ply Thickness | 0.016 | — | — |
| Specific Gravity | 1.35 | g/cc | ASTM-D-792 |
| Cure Cycle | 163°C Autoclave | — | — |
| Tensile Strength - Dry (24°C) | 614 | Mpa | ASTM-D-638 |
| Tensile Modulus - Dry (24°C) | 59.3 | GPa | ASTM-D-638 |
| Compressive Strength - Dry (24°C) | 531 | MPa | ASTM-D-695 |
| Compressive Modulus - Dry (24°F) | 64.1 | GPa | ASTM-D-695 |
| Flexural Strength - Dry (24°C) | 772 | MPa | ASTM-D-790 |
| Flexural Modulus - Dry (24°C) | 55.8 | GPa | ASTM-D-790 |
| Short Beam Shear - Dry (24°C) | 33.1 | MPa | ASTM-D-5379 |
Regulatory & Compliance
- Quality Standards
Storage & Handling
- Prepreg Storage Life
- Out Life: 30 days @ 75°F
- Shelf Life: 6 months @ 0°F and 3 months @ 40°F (dry)
- **Store F-502 Silica at 0°F (dry)